Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90ae09b96f1f0e4…

MALICIOUS

PDF

77.5 KB Created: 2021-04-01 21:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e18240bf448e1fa17787bb9ad1036881 SHA-1: 747ef9a4aff25f4ba4cae2186e4cd1526823a5e4 SHA-256: a90ae09b96f1f0e40bcc790207c79c503f13e7283c7758e783f41d47dbb734d2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that leads to a phishing site disguised as information about exercise bikes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing lure designed to redirect users to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://resalured.ru/strik?utm_term=how+to+use+a+recumbent+exercise+bike
    • http://hangzhoumetal.ru/bunurojiregibmtcdt.pdf
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/waxulonubob-gotawukidekadu.pdf
    • http://ritikutoxukor.22web.org/botasiwerepep.pdf
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/d4e897f9905b1.pdf
    • http://sefegusekepuxa.mypressonline.com/el_dador_de_recuerdos_espaol_latino_hd.pdf
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/1832918.pdf
    • http://tiktokfrance.fun/descargar_diccionario_biblico_thompsonglpjs.pdf
    • http://kelularuj.22web.org/vofisowelogupibeluforu.pdf
    • http://waliduv.mypressonline.com/rosifizonubogavogamipure.pdf
    • http://geniusenglish.space/living_forward_action_plan_guides7414.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kawerulim.onlinewebshop.net/el_cuervo_allan_poe.pdf
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_d119b65b9d7a4871ab0470d5c95acf5f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/04c03f71-d72d-4357-984a-b71f1f775984/99186769522.pdf
    • https://uploads.strikinglycdn.com/files/8f3f7294-7b6e-418d-9a0f-119bed980f3f/54517818793.pdf
    • https://uploads.strikinglycdn.com/files/7570a1dd-16e6-4028-b7f8-ecd49e9434b3/vezozobosofivupobokafolo.pdf
    • http://dajejat.rf.gd/gluten_free_diet_plan_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/f68474c6-a379-4613-ae27-13fcfbc2f2db/casio_ct_x700_specifications.pdf
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_a82b3682b8144ce59a6c4a5d904483c0.pdf?index=true
    • http://dujisuga.epizy.com/81818401538.pdf
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_079a66e4638141b69a1be9488b978e0a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a83f9422-ddfb-4cae-ae30-a7017e794fe0/bellus_3d_face_app.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09d.bin
22579db0bffe56d0abeeba84eb9bc97c22a6dc6819e3cbcb5cb2f33e66047065		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 5236 bytes
font_01_sfnt_off00010267.bin
92b27e214ca2e1aed92983398ff278f9054febb943a46a34746f40f65c48212f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 10872 bytes

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